Controlling device for hoisting-engines.



S. T. NELSON.

CONTROLLING DEVICE FOR HOISTING ENGINES.

APPLICATION FILED SEPT. 3, 190a. RENEWED PEB.16, 1912.

1,1 29,04, Patented Feb. 16, 1915.

2 SHBETSSHBET 1.

THE NORRIS PETERS 50.. PHOTGLlTHO.. WASHINGmN. D. C

S. T. NELSON.

CONTROLLING DEVICE FOR HOISTING ENGINES.

APPLICATION FILED SEPT. 3, 1908. RENEWED PEB.16, 1912. ll 9 1 ,@%5..

Patented Feb. 16, 1915.

2 SHEETS-SHEET 2.

HE NORRIS PETERS CO4. PHOTO-LITHO WASHING YON. D. c,

SVEN T. NELSON, OF CHICAGO, ILLINOIS.

CONTROLLING DEVICE FOR HOISTING-ENGINES.

Specification of Letters Patent.

Patented Feb. to, 1915.

Application filed September 3, 1908, Sefial No. 451,508. Renewed February 16, 1912. Serial No. 677,960.

To all whom it may concern Be it known that I, Sven T. NELSON, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Controlling Devices for Hoisting-Engines, of which the following is a specification. I

The invention relates to hoisting engines such as are employed for operating the cages or skips in the shaft of a mine, and more particularly to automatic throttling mechanism for preventing the over-running of the cages or skipsfisuch as is set forth in my prior Patent No. 900,768, dated October is, 1908.

The present invention seeks to simplify and improve the construction of the automatic throttling mechanism and consists in the features of improvement hereinafter set forth, illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a plan view of a hoisting engine with the present im provement applied thereto. Fig. 2 is a longitudinal section on the line 22 of Fig. 1. Fig. 3 is a longitudinal section on the line 3--3 of Fig. 1. Fig. l is a cross-section on the lines l4 of Figs. 1 and 2. Fig. 5 is a detail view with parts shown in section on the line 55 of Fig. 1.

The present improvement is particularly applicable to a hoisting engine which is arranged to operate two hoisting drums that are connected to two cages or skips in the mine shaft. These drums are usually mounted on the engine shaft and separate clutch mechanisms are provided for connecting and disconnecting the drums and shaft. The drums are connected to cables which are wound in opposite directions about the respective drums so that they are raised and lowered in balance, when both drums are coupled to the engine shaft. Suitable means are provided for automatically cutting oif the flow of motor fluid to the engine when either of the cars approaches the upper end of the mine shaft and thus preventing the car from overrunning. For this purpose two sets of controlling devices for the throttling mechanism are provided, one driven from each of the drums. The reversing mechanism is connected to throw the controlling devices alternately into and out of operative condition so that, after the throttles have been closed by the automatic mechanism, they can be released and opened by the engineer, provided he first operates the engine reversing mechanism to drive the engine in the opposite direction. The clutch mechanism for each. drum is also arranged to release or restore the corresponding controlling device for the throttling mechanism so that the engineer may release the controlling devices and open the throttle, provided he unclutches the drum which has operated the automatic throttling mechanism. As shown in the drawings, the drums 10 and 11 are mounted on the engine or drum shaft 12. This shaft extends between two engine frames 13 (only one of which is shown) and is journaled at its ends in suitable bearings 14- on the engine frames. It is also journaled on a central bearing 15 mounted upon a suitable standard 16. At each end, the shaft 12 is provided with a crank 17 which is coupled to the connecting rod 18 of the adjacent engine. Each engine cylinder is provided with suitable Corliss valve gear operated from a wrist-plate 20.

A valve-operating shaft 21 extends from side to side between the engine frames and in front of the drums and is journaled in suitable bearings 22. At each end, the valve shaft is provided with a cranlcarm 23 which is connected to the wrist-plate 20 of the adjacent engine by a connecting link 24;. The valve shaft is driven from the engine shaft through the medium of an intermediate idler gear 25 which meshes with a gear 26 on the engine shaft and with a gear 27 on the valve shaft. The gear 27 is loosely mounted on the valve shaft and is provided with two abutments 28 (see Fig. 5) which are arranged to engage a crank-arm 29 that is fixed to the valve shaft to drive the same in opposite directions. The valve shaft may be shifted in any, suitable manner to move the arms 29 thereon from one of the abutments 28 on the gear 27 to the other to effect the reversal-of the engine. In the form shown, this shift of the valve shaft relatively to the drive gear 27 is effected by an auxiliary reverse engine 30. The piston rod of this engine is connected by links 31 to a ring 32 that engages a groove in a nut 33 on the valve shaft. This nut is shifted longitudinally on the valve shaft by the in suitable brackets 41 on the foundation of the machine and at one point is provided with an upwardly projecting arm 42 (see Figs. 1, 2 and 3) that is connected by a link 43 to a hand-lever 4 1- through the medium of which the engineer controls the reverse gear of the engine.

The engine cylinder is provided with a suitable throttle valve 45 and the stem 46 of the throttle valve is connected to a set of double toggle links 47 and 48. These toggle links are connected by a rod 49 to a'crankarm 50 on one end of a short shaft 51. This shaft is journaled in a bracket 52 mounted on the adjacent engine frame and is provided at its inner end with a crank-arm 53 which is connected by a link 54 to a crankarm 55 on one end of a shaft 56. This shaft 'is journaled in suitable bearings 57, and extends across the machine from one engine frame to the other. Only one end of this shaft is shown but it will be understood that the other end of the shaft is connected by similar mechanism to the throttle valve of the engine at the other end of the drum shaft 12. Intermediate its ends the throttle-controlling rock-shaft 56 is provided with a crank-arm 58' which is connected by a link 59 to a hand-lever 60 through the medium of which the engineer may open and close the throttles.

As stated, the drums 10 and 11 are loosely mounted on the drum shaft 12 and are each arranged to be connected to the shaft and disconnected therefrom by a suitable clutch 61. This clutch may be of any suitable form and may be controlled in any suitable manner. In the construction shown, each clutch is operated by an auxiliary clutch engine 62. The piston rod of this engine is connected to a crank-arm 63 upon a rock-shaft 6%. This shaft isjournaled in suitable bearings at the outer end of the corresponding drum and is provided at its forward end with a pair of rock-arms 65 which engage a ring 66 mounted within a groove, of a sleeve 67 on the drum orengine shaft 12. The sleeve 67 slides on the engine or drum shaft 12 and is arranged to operate the clutch 61 through the mediumof a toggle lever 68.

Suitable means are provided for controlling-the valves of the auxiliary clutch engine 62. As indicated, the valve stem of each clutcheng ne is provided with a crankarm 69 which is connected bv a link to a crank arm 70 on a sho t shaft 71 that is journaled in a bracket 72 on the foundation of the engine. This shaft is provided with a crank-arm 73 that is connected by a link 74 to a crank-arm 75 on a clutch-controlling rock-shaft 76. This shaft is journaled in suitable brackets 77 on the foundation of the engine and a clutch-controlling hand-lever 78 is fixed thereto. There are, of course, two of these clutch-controlling hand-levers 78 and rock-shafts 76 so that the engineer may separately control the auxiliary clutch engines 62 to connect and disconnect either of the hoisting drums and the drum or engine shaft.

The throttling mechanism, reverse gear and clutch mechanisms described are more fully set forth in the prior application No. 315,955 above referred to and need not be more fully described here. Any suitable form of throttle valve mechanism, reversible valve gear and clutch mechanism may be employed without departure from the essentials of the invention. In the form shown, the throttle-controlling hand-lever 60 is loosely mounted on one end of one of the shafts 76 and the reverse-controlling hand-lever 4:4: is looselv mounted on the other rock-shaft 76. The clutch-operating hand-levers 78 are, as stated, fixed to the shafts 76. To automaticallv close the throttles when the car connected to either of the drums approaches the surface, two actuating mechanisms are provided, one driven from each of the drums and separate shifters controlled respectively by the actuating mechanisms are arranged to effect the closing of the throttle valves. The two actuating mechanisms, one driven from each of the drums, are alike in construction and comprise two rotary actuator cams 79 and 79. Each of these cams is provided, as shown in Figs. 2 and 3, at one point in its periphery with a segmental cam lug a which is provided at one end with an inclined cam face 6 and also with a segmental face 0. The segmental face is preferably of considerable length. In the form shown it extends through an arc of about 90 degrees. These cams 79 and 79 are fixed respectively to the ends of a pair of shafts 80 that are journaled in suitable standards or uprights 81 mounted upon the foundation of the machine. Similar reducing drive gearing is employed for driving each of the shafts S0 and actuator cams thereon from the respective drums. This reducing drive gearing comprises a spur gear 82 fixed to the inner end of the shaft 80 adjacent a bracket or upright 88 which is mounted on the foundation of the machine and which is provided at its upper end with a bearing for the inner end of the shaft 80. The gear 82 meshes with a smaller spur gear 84 upon the inner end of a counter shaft 85 that is iournaled at its ends in the upr ghts 81 and 83. A worm wheel 86 fixed to the shaft is engaged by a worm 87 upon a shaft 88. This shaft is journaled at its rear end in the upright or standard 83 and extends forwardly therefrom toward the engine shaft 11. At its forward end the shaft 88 is journaled in a bracket 89 fixed to the upright 16. A pair of beveled gears 90 connect the shaft 88 to a spur pinion 91 which is mounted upon a suitable stud or shaft in the bracket 89 and which meshes with a larger spur gear The two spur gears 92 of the driving mechanisms for the actuator cams 79 and 79 are fixed respectively to projecting hub portions 93 on the inner ends of the drums 10 and 11 so that the'actuator cams are driven from the engine shaft through the medium of the drums and are connected thereto and disconnected therefrom with the drums.

The actuator cams 79 and 79 are arranged to operate respectively a pair of shifter arms or levers 94 and 9 1 which in turn act to closethe throttles when either of the cars or cages approaches the upper end of the mine shaft. Each of these shifter anns or levers is pivotally connected intermediate its ends by a pivot bolt or stud 95 to the upper end of a swinging support 96. The swing ing support is pivotally connected at its lower end to the standard or upright 81 by a pivot bolt 91''. The upper, free end of each shifter arm or lever isprovided with a roller 98 which is arranged to be engaged by the corresponding actuator cam. The lower end or tail portion 99 of each of the shifter arms or levers 9 t and 9 1* is con-- nected by a link 100 with a rock-arm 101 that is fixed to the throttle-controlling rockshaft 56 so that the actuator cams may operate through the medium of the shifter arms to close the throttle valves. Each of the shifter arms or levers, as most clearly shown in Fig. 1-, is arranged on one side of its swii'iging support 96. On the opposite side of each swinging support is arranged a crossarm 102 that is pivotally connected intermediate its ends to the swinging support 90 by the pivot bolt or stud 95. The upper end of each of the cross arms 102 is connected by a link 103 with the corresponding clutchcontrolling hand-lever 78 and the lower ends of these cross-arms, as shown in Figs. 2 and 3, are connected respectively by links 10-1 and 105 to .a pair of oppositely arranged crank-arms 106 and 107 on the reverse-controlling rock-shaft 1-0. By this arrangement the shift of either clutch-controlling handlever 78 will throw the corresponding shifter arm to and from its actuator cam. That is to say, when one of the clutch levers 78 is moved to throw its clutch to set position and connect one of the drums to the engine shaft, the corresponding shifter arm will be moved toward its actuator cam, and when the clutch lever is moved to disconnect the drum the corresponding shifter arm will be moved away from its actuator cam. The operation of the reverse-controlling rock-shaft 40 serves through the medium of the crankarnis 106 and 107 and connecting links 1041 and 105, to throw one of the shifter arms toward its actuator cam and the other away from the same. Each of the shifter arms 9% and 941 therefore, has three distinct movements to and from the corresponding actuator cam 79 or 79 one movement with the throttle valve mechanism, one with the corresponding clutch mechanism, and one with i the reverse gear. That is to say, in order that the shifter arm shall be in position to be operated by its actuator cam, as shown in Fig. 2, the throttle valve mechanism must be shifted to position to open the throttle valves, the corresponding clutch mechanism must be in set position, and the reverse gear must he in such position that the corresponding drum will be driven in proper direction to raise the car or cage connected thereto. The automatic throttling mechanism driven from the drum 10 is illustrated in Fig. 2 and that driven by the drum 11 is illustrated in Fig. 3. The reverse gear is shown in position to drive the actuator cams 79 and 79 in the direction indicated by the arrows. Both clutch mechanisms are shown in the position assumed when both drums are coupled to the engine or drum shaft and the throttling mechanism is in proper position to hold the'throttle valves open. As indi cated in Figs. and 3, the reverse gear tl rough the medium of the rock-shaft 40 and the oppositely arranged cross-arms 106 and 107 thereon serves to hold the shifter arm or lever 9%- into operative relation with the actuator cam 79 that is driven from the drum 10, while the shifter arm 9 1' which is operated by the actuating cam 79 driven from the drum 11, is held out of operative relation therewith by the reverse gear. Under such circumstances, the engine will be driven in proper direction to raise the cage connected to the drum 10 and lower the cage connected to the drum 11. When the shaft 40. is rocked in the direction shown by the arrows in Figs. 2 and 8 to reverse the direction of moven'ient of the engines and the cars or cages connected to the drums, the shifter-arm 945 will be thrown into operative relation with its actuator cam 79 and the shifter arm. 9% will be thrown out of operative relation with its actuator cam 7 9. As shown in the drawings. the actuator cam 79 is about to throw the shifter arm 9i and close the throttles. l Vhen this is effected, the concentric portion 0 of the actuator cam will hold the throttles in closed position and will. prevent the engineer from opening the throttle valves when the car or cage connected to the drum 10 is at the upper end of the shaft unless he first operates the reverse mechanism to drive the engine and the cars or cages in the opposite direction, or

unless he first disconnects the drum 10 from the engine shaft by operating the corresponding clutch mechanism. If he should uncouple the drum 10 by operating the corresponding clutch lever 78, the shifting support 96 will be moved thereby to throw the shifter arm or lever 91 out of operative re lation with the actuator cam 79 and the throttle valves may then be opened to continue the movement of the engine in the same direction and shift the car or cage connected to the drum 11. Under no circumstances, however, could the engineer, either by accident or inattention, move either car or cage to the upper end of the mine shaft under a full head of steam. The operating gearing for the throttling mechanism is so arranged that it will be actuated when one or the other of the cars or cages reaches a predetermined point near the upper end of the mine shaft. The travel of the car to the top of the mine shaft is controlled by the momentum of the moving parts. In case this should be insufficient, by-passes may be provided around the throttle valves to admit a small amount of steam to the engine cylinders.

It is obvious that numerous changes may be made in the details set forth, without departure from the essentials of the invention.

I claim 1. In a hoisting engine, the combination With the engine shaft, a driven member and clutch mechanism for connecting and disconnectingsaid member and said shaft, of means for cutting off the flow of motive fluid to the engine, a shifter controlling the operation of said means, and a bodily stationary, rotatable actuator driven from the en- 'gine arranged to effect the operation of said shifter at a predetermined point, said clutch mechanism being arranged to throw said shifter into and out of operative relation with said actuator.

2. In a hoisting engine, the combination with the engine shaft, a driven member and clutch mechanism for connecting and disconnecting said member and said shaft, of throttling mechanism for the engine, an operating shifter for said throttling mechanism, a bodily stationary, rotatable actuator cam geared to and driven by said member for operating said shifter at a predetermined point, a shiftable support whereon said shifter is movably mounted, and connections between said clutch mechanism and said support for throwing said shifter into and out of operative relation with said actuator cam.

3. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, a pair of shifters, means for cutting off the flow of motive fluid to the engine controlled by said shifters, a pair of bodily stationary, rotatable actuators respectively geared to and driven by said members and arranged to effect the operation of said shifters at predetermined points and connections between said clutch mechanisms and the corresponding shifters for throwing the same into and out of operative relation with said actuators.

4. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of a pair of shifters, throttling mechanism for the engne controlled by said shifters, a pair of bodily stationary, rotatable actuator cams respectively geared to and driven by said members and arranged to operate said shifters at predetermined points, shiftable supports \vhereon said shifters are movably mounted and connections between said clutch mechanisms and the corresponding shifter supports for throwing said shifters into and out of operative relation with said actuator cams.

5. In a hoisting engine, the con'ibination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of throttling mechanism for the engine, a pair of operating shifters connected to said throttling mechanism, a pair of bodily stationary, rotatable actuator cams for operating said shifters at predetermined points, worm gearing connecting said actuator cams, one to each of said members, and connections between said clutch mechanisms and the corresponding shifters for throwing the same into and out of operative relation with said actuator cams.

6. In a hoisting engine, the combination with the engine shaft, a pair of driven mem bers, and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of throttling mechanism for the engine, a pair of operating shifters connected to said throttling mechanism, a pair of bodily stationary, rotatable actuator cams arranged to effect the operation of said shifters at predetermined points, gearing connecting said actuator cams respectively to said members, a pair of supports whereon said shifters are mounted, said shifters being movable at right angles to the axes of said actuator cams to throw said shifters into and out of operative relation therewith and operating connections between said clutch mechanism and the supports for the corresponding shifters.

7. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of a throttle valve for the engine, a pair of shift levers connected to said throttle valve, a pair of rotary actuator cams for operating said shifters at predetermined points, Worm gearing connecting said actuator cams one to each of said members, pivoted supports Whereon said shift levers are mounted, said supports being arranged to move at right angles to the axes of said actuator cams to throw said shift levers into and out of operative relation With said cams, and operating connections between said clutch mechanisms and the sup ports for the corresponding shift levers.

8. In a hoisting engine, the combination With the engine shaft, a pair of driven mem bers and clutch mechanisms for connecting and disconnecting said members and said shaft, of a throttle valve for the engine, a pair of operating shift levers connected to said throttle valve, a pair of bodily stationary, rotatable actuator cams for operating said shift levers at predetermined points, Worm gearing connecting said actuator cams, one to each of said members, shiftable supports Whereon said shift levers are pivoted, and operating connections between said clutch mechanisms and the supports for the corresponding shift levers for throwing the latter into and out of operative relation With said actuator cams.

9. In a hoisting engine, the combination With the engine shaft, a driven member and clutch mechanism for connecting and dis connecting said driven member and said shaft, of means for cutting ofi the how of motive fluid to said. engine, a shifter controlling the operation of said means, a bodily stationary and rotary actuator cam arranged to effect the operation of said shifter at a predetermined point, a gear rigidly connected to said cam, reducing drive gearing interposed between said gear and the engine shaft, and means operated by said clutch mechanism for throwing said shifter and said actuator cam into and out of operative relation.

10. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of throttling mechanism for the engine, a pair of shift levers connected to said throttling mechanism, a pair of rotary actuator cams for operating said shift levers at predetermined points, shafts Whereon said cams are fined, gears fixed to said shafts, counter-shafts having gears meshing With said cam gears, Worm gearing connecting said counter-shafts respectively to said members, and means connected to and operated by said clutch mechanisms for throwing said shifters and said actuator cams into and out of operative relation. 4

11. In a hoisting engine, the combination With the engine shaft, a pair of driven members and separate clutch mechanisms forconnecting and disconnecting said members and said shaft, a pair of shifters controlling the operation of said throttling mechanism, a pair of bodily stationary rotary actuator cams for effecting the operation of said shifters at predetermined points, gears rigidly connected to said actuator cams, counter-shafts having gears meshing with said cam gears, Worm gear-connecting said counter-shafts respectively to said drums, and means controlled by said clutch mechanisms for setting the corresponding shifters into and out of condition for operation.

12. In a hoisting engine, the combination With the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of a pair of operating shifters connected to said throttling mechanism, a pair of rotary actuator cams for operating said shifters at predetermined points, shafts Whereon said cams are fixed, gears fixed to said shafts, counter-shafts parallel to said cam shafts and having gears meshing with said cam gears, counter-shafts arranged at right angles to said first mentioned counter-shafts and geared to and driven respectively by said members, \vorm gearing connecting the latter counter-shafts to said first mentioned counter-shafts, and means controlled by said clutch mechanisms for setting the corresponding shifters into and out of operative condition.

13. In a hoisting engine, the combination With the engine shaft, a driven member and.

clutch'mechanism for connecting and disconnecting said member and said shaft, of throttling mechanism for the engine, a shifting device controlling the. operation of said throttling mechanism, a rotary actuating device driven by the engine and arranged to effect the operation of said shifting device at a predetermined point, a support movable at right angles to the axis of said rotary actuating device ivhereon one of said devices is mounted and connections between said clutch mechanism and said support for throwing said shifting and said actuating devices into and out of operative relation.

14-. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of throttling mechanism for the engine, a pair of shifting devices controlling the operation of said throttling mechanism, a pair of rotary cam devices held against axial movement, geared to and driven respectively by said members and arranged to effect the operation of said shifting devices at predetermined points, a pair of supports \vhereon one pair of said devices .are mounted, said supports being shiftable cam devices to throw said cam and said shifting devices into and out of operative relation and connections between said clutch mechanisms and said supports for operating the same. i

15. In a hoisting engine, the combination with the engine shaft, a driven member and clutch mechanism for connecting and disconnecting said member and said shaft, of throttling mechanism for the engine, a shifter controlling the automatic operation of said throttling mechanism, an actuator cam connected to and driven in opposite directions by the engine and arranged to effeet the operation'of said shifter at a predetermined point, a shiftable support whereon said shifter is mounted, said shifter being movable independently of said support to effect the operation of said throttling mechanism, and connections between said clutch mechanism and said support to throw said shifter into and out of operative relation with said actuator cam.

16. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of throttling mechanism for the engine, a pair of shifters controlling the operation of said throttling mechanism, a pair of rotary actuator camseonnect-ed to and driven in opposite directions respectively by said members and arranged to operate said shifters at predetermined points, supports whereon said shifters are mounted, said supports being movable at right angles to the axes of said cams to throw said-shifters into and out of operative relation therewith, and connections between said clutch mechanisms and the supports for the corresponding shifters for operating the same.

17. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and saidshaft, of throttling mechanism for the engine, a pair of operatin shift levers connected to said throttling mechanism, a pair of rotary actuator cams geared to and driven respectively by said members and arranged to operate said shift levers at predetermined points, a pair of shiftable supports whereon said shift levers are pivoted, said shift levers being movable independently of said supports for operating said throttling mechanism, and connections between said clutch mechanisms and said supports for throwing said shift levers into and out of operative relation with said actuator cams.

18. In a hoisting engine, the combination with the engine shaft, a pair of driven members and separate clutch mechanisms for connecting and disconnecting said members and said shaft, of a throttle valve for the engine, a pair of shift levers operatively connected to said throttle valve, a pair of rotary actuator cams for operating said shaft levers at predetermined points, reducing gearing connecting said cams respectively to said members, a pair of pivoted supports whereon ,said shift levers are pivotally mounted, said supports being movable to and from the axes of said cams to throw said shift levers into and out of operative relation therewith, and operating connections between said clutch mechanisms and the supports for the corresponding shift levers.

19. In a hoisting engine, the combination with the engine shaft, a driven member, clutch mechanism for connecting and disconnecting said shaft and said member and engine reverse gear, of means for cutting off the flow of motive fluid to the engine. a shifter controlling the operation of said means, a bodily stationary, rrtatable actuator driven by the engine and arranged to effect the operation of said shifter at a predetermined point, and independently operating connections extending from said clutch mechanism and said reverse gear to said shifter to throw the same into and out of operative relation with said actuator.

20. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft, of means for cutting oif the flow of motive fluid to the engine, a pair of shifters controlling the operation of said means, a pair of bodily stationary, rotatable actuators connected respectively to and driven by said members, means operated by said clutch mechanisms for throwing the corresponding shifter into and out of operative relation with its actuator and means operated by said reverse gear for alternately throwing said shifters into and out of operative relation with said actuators.

21. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifters controlling the operation of said throttling mechanism, a pair of bodily stationary, rotatable actuator cams connected to and driven respectively by said members and arranged to effect the operation of said shifters at predetermined points, a pair of normally stationary supports whereon said shifters are movably mounted, said shifters being movable independently of said supports to effect the operation of said throt tling means and said supports being movable to throw said shifters into and out of operative relation with said actuator cams, operating connections between said clutch mechanisms and the supports for the correspending shifters, and independent operating connections between said reverse gear and said supports for alternately throwing said shifters into and out of operative relation with said cams.

22. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of operating shifters connected to said throttling mechanism, a pair of bodily stationary, rotatable actuator cams for operating said shifters at predetermined points, gearing connecting said actuator cams respectively to said members, a pair of supports whereon said shifters are movably mounted, said shifters being movable at right angles to the axes of said came to throw said shifters into and out of operative relation therewith, connections between said supports and said clutch mechanisms and independent connections between said supports and said reverse gear.

In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the en gine, a pair of shifting devices for c ontrolling the operation of sa d throttling mechanism, a pair of rotary actuating devices connected to and dr'.ven respectively by said members and arranged to effect the operation of said shifting devices at predetermined points, a pair of independent sup ports whereon one pair of said devices are mounted, connections between said clutch mechanisms and said supports for throwing said devices into and out of operative relation, and connections between said reverse gear and said supports for alternately shifting the same in opposite directions to throw said devices into and out of operative relation.

In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism. for the engine, a pair of shifting devices controlling the operation. of said throttling mechanism, a pair of actuating devices connected to and driven respectively by said members, a pair of shiftable supports whereon one pair of said devices are movably mounted, connections between said clutch mechanisms and said supports for throwing said devices into and out of operative relation, a rock-shaft forming part of said reverse gear, oppositely arranged arms on said rock-shaft and connections between said arms and said supports for alternately throwing said devices into and out of operative relation.

25. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifting devices controlling the operation of said throttling mechanism, a pair of actuating devices connected to and driven respectively by said members and arranged to effect the operation of said shifting devices at predetermined points, a pair of shiftable supports whereon one pair of said devices are movably mounted, a pair of arms pivoted respectively to said supports, connections between said clutch mechanisms and said arms for throwing said devices into. and out of operative relation and connections between said reverse gear and said arms for alternately throwing said devices into and out of operative relation.

26. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifting devices connected to said throttling mechanism, a pair of rotary cam de vices connected to and driven by said members for op rating said shifting devices at predetermined points, a pair of shiftable supports whereon one pair of said devices are movably mounted, a pair of arms pivoted respectively to said supports, connections between said clutch mechanisms and said supports for throwing said devices into and out of operative relation, a rockshaft forming part of said reverse gear, oppositely arranged rock-arms on said shaft, and connections between said rockarms and the arms on said supports for alternately throwing said devices into and out of operative relation.

27. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connccting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifting devices connected to said throttling mechanism, a pair of rotary actuator cam devices for operating said shifting devices at predetermined points, operating gearing connecting said cam devices respectively to said members, a pair of pivoted supports whereon one pair of said devices are movably mounted, a pair of arms pivoted intermediate their ends to said supports, connections between said clutch mechanisms and one of said arms for throwing said devices into and out of operative relation, and a rock-shaft forming part of said reverse gear and having oppositely arranged rock-arms connected to the other ends of the arms on said supports for alternately shifting said devices into and out of operative relationv 28. In a hoisting engine, the combination With the engine shaft, a driven member, clutch mechanism for connecting and disconnecting said member and said shaft and engine reverse gear, of throttling mechanism for the engine, a shifter controlling the operation of said throttling mechanism, a rotary actuator cam connected to and driven by said member for operating said shifter at a predetermined point, a support Whereon said shifter is movably mounted, said support being movable to and from the axis of said cam to throw said shifter into and out of operative relation therewith, operating connections between said clutch mechanism and said support and operating connections between said reverse gear and said support.

29. In a hoisting engine, the combination With the engine shaft, a driven member, clutch mechanism for connecting and disconnecting said member and said shaft and engine reverse gear, of a throttle valve for the engine, a shift lever connected to said throttle valve, a rotary actuator cam connected to and driven by said member for operating said shift lever at a predetermined point, a pivoted support whereon said shift lever is pivotally mounted, an arm pivoted to said support and separate connections extending from said arm to said clutch mechanism and to said reverse gear for throwing said shifter into and out of operative relation with said cam.

30. In a hoisting engine, the combination With the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members,

and said shaft and engine reverse gear, of

throttling mechanism for the engine, a pair of shifters controlling the operation of said throttling mechanism, a pair of rotary actuators connected to and driven respectively by said members and arranged to effect the operation of said shifters at predetermined points, a pair of supports for said shifters,

said shifters being movable independently of said supports to effect the operation of said throttllng mechanism, connections between said clutch mechanisms and said supports and connections between said reverse gear and said supports for throwing said shifters into and out of operative relation with said actuators.

31. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttlingmechanism for the engine, a pair of rotary actuator cams connected to and driven respectively by said members for operating said shifters at predetermined points, a pair of supports wherever said shifters are mounted, said supports being movable to and from the axes of said cams for throwing said. shifters into and out' of operative relation therewith, connections between said clutch mechanisms and supports for the corresponding shifters, and oppositely-acting connections between said reverse gear and said supports for alternately throwing said shifters into and out of operative relation witn said actuator cams.

32. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifters controlling the operation of said throttling mechanism, a pair of actuator cams connected to and driven from said members for operating said shifters at predetermined points, a pair of shiftable supports whereon said shifters are movably mounted, connections between said clutch mechanisms and supports for the corresponding shifters for throwing the same into and out of operative relation with said actuator cams, a rock-shaft forming part of said reverse gear, oppositely arranged arms on said rock-shaft and connections between said arms and said supports for alternately throwing said shifters into and out of operative relation with said actuator cams.

38. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of operating shifters connected to said throttling mechanism, a pair of rotary actuator cams connected to and driven respectively by said members, a pair of shiftable supports whereon said shifters are movably mounted, arms pivoted to said supports, connections between said clutch mechanisms and said arms and connections between said reverse gear and said arms for throwing said shifters into and out of operative relation with said actuator cams.

3-1. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shifters connected to said throttling mechas nism, a pair of rotary actuator cams connected to and driven respectively by said members for operating said shifters at predetermined points, a pair of supports Whereon said shifters are movably mounted, said supports being shiftable to and from the axes of said cams for throwing said shifters into and out of operative relation, a pair of arms pivoted to said supports, operating connections between said clutch mechanisms and said arms, a rock-shaft forming part of said reverse gear, oppositely arranged arms on said roclr shaft, connections between said arms and the arms on said supports for alternately throwing said shifters into and out of operative relation with said actuator cams.

85. In a hoisting engine the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of a throttle valve for the engine, a pair of shift levers connected to said throttle valve, a pair of rotary actuator cams connected to and driven respectively by said members, a pair of shiftable supports, whereon said shift levers are pivoted, a pair of arms pivoted on said supports, connections be tween said clutch mechanisms and said arms for throwing said shifters into and out of operative relation with said cams, and oppositely acting connections between said reverse gear and said arms for alternately throwing said shifters into and out of 0perative relation with said actuator cams.

36. In a hoisting engine, the combination with the engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft and engine reverse gear, of throttling mechanism for the engine, a pair of shift levers connected to said throttling mechanism, a pair of bodily stationary, rotatable actuator cams for operating said shifters at predetermined points, reducing gearing connecting said actuator cams respectively to said members, a pair of pivoted supports whereon said shift levers are pivotally mounted, a pair of arms pivoted intermediate their ends to said supports, a connection between each of said clutch mechanisms and one end of one of said arms for throwing the corresponding shifter into and out of operative relation with its actuator cam, and a rock-shaft forming part of said reverse gear and having oppositely arranged arms thereon connected to the other ends of the arms on said supports for alternately throwing said shift levers into and out of operative relation with said actuator cams.

87. In a hoisting engine, the combination with the engine shaft, a driven member clutch mechanism for connecting and disconnecting said shaft and said member, and an engine reverse gear, of means for cutting of? the flow of motive fluid to the engine, a shifter controlling the operation of said means, a rotatable cam held against axial movement for actuating said shifter, speed redi'lcing gearing for driving said cam from said member to effect the operation of said shifter at a predetermined point, said shifter and said actuator cam being relatively'shiftable into and out of operative relation in a direction at right angles to the axis of said cam, and independent means connected to said clutch mechanism and to said reverse gear for throwing said shifter and actuator cam into and out of operative relation.

38. In hoisting mechanism for engines, the combination with an engine shaft, a pair of driven members, separate clutch mechanisms for connecting and disconnecting said members and said shaft, and an engine reverse gear, of means for cutting 0E the flow of motive fluid to the engine, a pair of shifters controlling the operation of said means, a pair of rotatable cams held against axial movement for actuating said shifters, speed reducing gearing connecting said actuator cams respectively to said members, said actuator cams and said shifters being relatively movable into and out of operative relation in a direction at right angles to the axis of said cams, means operated by each of said clutch mechanisms for throwing the corresponding actuator cam and shifter into and out of operative relation, and means operated by said reverse gear for alternately throwing said pairs of actuator cams and shifters into and out of operative relation.

SVEN T. NELSQN.

Witnesses HARRY L. CLAPP, CLARA A. NORTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

